we are getting this error message from one of our employee.not regularly but oftenly when ever he trying to send the email he is getting this undelivered message on his account
Undeliverable: Reporting Details for April 20, 2015 - Reston, VA
Your message did not reach some or all of the intended recipients.
Subject: Reporting Details for April 20, 2015 -
Sent: 4/20/2015 12:23 PM
The following recipient(s) cannot be reached:
on 4/20/2015 12:23 PM
This message could not be sent. Try sending the message again later, or contact your network administrator. Error is [0x80070005-00000000-00000000].
This message could not be sent. Try sending the message again later, or contact your network administrator. Error is [0x80070005-00000000-00000000].